Related Experiment Video
Updated: Oct 18, 2025
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
21.9K
Design and Sintering of All-Solid-State Composite Cathodes with Tunable Mixed Conduction Properties via the Cold
Zane Grady1,2, Zhongming Fan2, Arnaud Ndayishimiye2
1Materials Science and Engineering Department, College of Earth and Mineral Sciences, The Pennsylvania State University, University Park, Pennsylvania 16801, United States.
ACS Applied Materials & Interfaces
|September 28, 2021
Summary
Cold sintering controls ion and electron conductivity in solid-state battery cathodes. This low-temperature process enhances composite materials for improved energy storage performance.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- Solid-state batteries require electrodes with both ionic and electronic conductivity.
- Controlling mixed conductivity is crucial for efficient energy extraction.
Purpose of the Study:
- To investigate cold sintering for controlling mixed conductivity in composite cathodes.
- To assess the impact of low-temperature densification on material properties.
Main Methods:
- Cold sintering was applied to Na3V2(PO4)3 (NVP), Na3Zr2Si2PO12 (NZSP), and carbon nanofiber (CNF) composites.
- Densification achieved >90% theoretical density at 350-375 °C with NaOH aid.
- Bulk conductivity and transference numbers were measured via impedance spectroscopy and DC polarization.
Main Results:
- Cold sintering significantly increased composite conductivity, e.g., from 3.8 × 10^-8 S·cm^-1 (NVP) to 1.31 × 10^-5 S·cm^-1 (5 wt% CNF).
- Transference numbers were modulated, with pure NVP at 0.966 and 5 wt% CNF at 0.116.
- Triphasic composites demonstrated maintained electrochemical activity in a half-cell configuration.
Conclusions:
- Cold sintering is an effective method for tuning mixed conductivity in solid-state battery cathodes.
- This technique allows for controlled optimization of ion and electron transport pathways.
- The developed composite cathodes show promise for next-generation energy storage devices.
